REDCap IntroductionUser Group Meeting

By J Kevan Essmyer

Acknowledgements:Paul Harris

Need for Data Capture Software

• Convenient uniform data entry method– Stateless web-based– Secure WUSM HIPAA compliant centralized data

store. • Easy to use multi-purpose clinical database– Not Excel, Not Access, Not 3-4 composition

notebooks somewhere on the top shelf • Mostly self service• Reduce data “cleaning” effort during analysis.

File Server

Host Server

WEB Server

Uploaded Files

Installation Files

Tiresias Server

WUCON

Sidedoor Server

https://redcapsurvey.wustl.edu...

REDCap Survey

Data Entry /Admin

Data Entry /Admin

MySQL Server

MySQL Slave Server

Data

Sync

Biostatistics Secure Domain

Authenticated Access

Public HTTPS Access

Development Server“Trying it Out”

• http://www.biostat.wustl.edu/redcap • REDCap User Request forms (Fax or email)– Sponsoring PI– Username /password– Open access to the Development server

• Off-campus Access– Sidedoor security certificate– Access from any “capable” Internet connection (world

wide)

Case Report FormsVisual Status Data Validation

NumerousField Types

+ Text (Free) (Number) (Phone) (Zip) (Date)+TextArea+Select+Radio+File

BranchingLogicAuto-Variable Coding

HumanReadableLabels

PDFs

Field Types

Data Validation

Study Calendar – Participant Scheduling

Participant Scheduling Module OptionalVisit-Level View Shows Status + CRFs (Longitudinal Model)

REDCap Application (Classic Model)

CRFs – Customized For Each Study

REDCap Core Modules– Available For All Studies

Project-Level Metadata Defined by Research Team

Audit Trails / Data Logging

Full Audit Logs – Data Changes and Page Views

Reports

User Permission Rights Hierarchy

REDCap Administrators-Grant Access to the System-Grant Creation Rights to PI and Project Admins

PI and REDCap Administrators-Full Users Rights to Project-Responsible for setting Right of other users

(PHI, Data Entry, Reporting)

Regulars Users with restricted permissions

“?!!?”

User Rights

Branching

Logic

Scheduling

API

Data Dictionary

Data

Validation

REDCap Lifelines

• Built-in tutorial videos• Built-in Frequently Asked Question (FAQ)

guide• Demonstration Databases (Some Online, more

to come)• WUSM Biostat REDCap Email Help Queue– [redcap@rt.biostat.wustl.edu]– Monitored by 4 to 5 Administrators

Top-Down and In-Line Video Training Resources

Built-in FAQ

REDCap Email Support

redcap@rt.biostat.wustl.edu

Project Creation Flow Chart

Create Project –Project Name, Longitudinal or Cross-Sectional/ Survey

Excel SpreadsheetOr

Online Form Designer

Data EntryForms

Add Users and

Set User Rights

Test

Forms

Move to Production Status on Production Server and

start Data Collection

Define Study Events

(Longitudinal)

add Schedule (optional)

Production Server“Real Data”

• http://www.biostat.wustl.edu/redcap • REDCap Project Request form (Fax or email)

– Sponsoring PI– IRB Approval or Waiver– Only PI or Project Admin can create projects

• Production “Status”– Data Dictionary

• Changes saved• Review of submitted changes to avoid unintended data corruption• Delete all records function disallowed

Automated Data Export / Import (API)

• Web based RESTFUL Service – Uses http(s) URL calls similar to the web browser – Programming Language neutral works for • (SAS, R, Python, Java)

– Advantages• Automate access to data and metadata• On demand custom Reporting• Linking Multiple REDCap Projects (Advanced)• All Transactions logged

REDCapWEB Server

WUCON

Sidedoor Server

Data Entry /Admin

Data Entry /Admin

Biostatistics Secure Domain

Authenticated Access

Accessible only from the secure Servers Routes

User Program

API Call

Response

Automated Data Export / Import (API)

• Export Methods– Required items

• Token – obtained from REDCap administrator must be kept secure• Content – record• Format – Export data format CSV, JSON, XML(default)

• Web based RESTFUL Service – Uses http(s) URL calls similar to the web browser – Programming Language neutral works for

• (SAS, R, Python, Java)

– Advantages• Automate access to data and metadata• On demand custom Reporting• Linking Multiple REDCap Projects (Advanced)• All Transactions logged

Simple SAS Example• filename ein "./etest_in.txt";• filename eout "./etest_out.txt";• filename ehdrout "./etest_hdrout.txt";

• data _null_; • file ein; input; put _infile_; datalines4; • token=8190DC542E1588AF52158EB181193DB9• &content=record&format=xml&type=flat• &fields=id, first_name, last_name• ;;;; run; quit;

• proc http • in=ein out=eout headerout=ehdrout • url="https://redcap.biostat.lan/redcap/srvrs/dev_v3_1_0_001/redcap/api/index.php" • method="post"• ct="application/x-www-form-urlencoded” ; run;

Built-in API Help

REDCap Goals

• Easy to use• Metadata Driven • Adaptable Features• Data entry validation• Self service tool

Questions?

Calculations• Simple• [weight]*10000/([height]*[height])

• Complex• Calculating the Mean of groups with null valid range includes zero

The following equation will calculate the Mean of a list of variables

•((if(Math.abs([A])>0,[A],0)) +(if(Math.abs([B])>0,[B],0))+(if(Math.abs([C])>0,[C],0)))/((if(Math.abs([A])>0,1,if([A]=0,1,0))+if(Math.abs([B])>0,1,if([B]=0,1,0))+if(Math.abs([C])>0,1,if([C]=0,1,0)))